Three-dimensional printer



FIG. 1 is a front perspective view of a three-dimensional printer showing our new design, with the access doors shown in the closed condition;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof; and,

FIG. 8 is a front perspective view of the three-dimensional printer showing our new design, with the access doors shown in the open condition.

The broken lines show in FIGS. 1, 2, and 8 are included for the purpose of illustrating portions of the three-dimensional printer that form no part of the claimed design. 

CLAIM The ornamental design for a three-dimensional printer, as shown and described. 